Option 1 -> Starts with price pressure before supply decrease, incorrect sequence.
Option 2 -> Places price pressure before buyer competition, incorrect sequence.
Option 3 -> Places price pressure before buyer competition, incorrect sequence.
Option 4 -> Correct sequence: Supply decreases first (D), then buyers compete (B), creating price pressure (A), leading to new equilibrium (C).
Hence, Option 4: (D), (B), (A), (C) -> When a hurricane destroys the onion crop, the logical chain of events is: (D) First, market supply decreases causing excess demand (shortage); (B) Then, buyers compete for the limited onions available; (A) This competition creates upward pressure on prices; (C) Finally, higher prices cause demand to contract and supply to expand until a new market equilibrium is achieved. This follows the basic economic principle of supply-demand adjustment through price mechanism. -> correct